Article
Chemistry, Physical
Seung-Ik Han, Sang Yeon Lee, Le Thai Duy, Hyungtak Seo
Summary: A novel reversible gasochromic hydrogen sensor was developed using a combination of Pt-Ni catalyst and MoO3 active layer, showing rapid coloration and recovery within seconds, capable of detecting H2 gas in optical and electrical modes. The sensor was fabricated through dry processes, indicating potential for large-scale production and integration.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Sunday Temitope Oyinbo, Tien-Chien Jen
Summary: This study focuses on using reactive molecular dynamics (RMD) approach to extract kinetic parameters and reaction behaviors of complex chemical processes in alkaline environment from monometallic to heterometallic surfaces. The integration of a second metal into monometallic surfaces can significantly increase the alkaline electrolytic hydrogen evolution reaction activity, with Fe/Ni heterometallic surface showing the best activity with a Fe/Ni ratio of 50%.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Physics, Multidisciplinary
Jayakrishnan M. P. Nair, Debsuvra Mukhopadhyay, G. S. Agarwal
Summary: In recent years, the importance of exceptional points in sensing linear perturbations has been recognized. Sensing anharmonicities is essential for controlling various semiclassical and quantum effects resulting from nonlinear interactions. A proposed sensing scheme utilizes coherence between two modes induced by a common vacuum to enhance the detection of very weak anharmonicities.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Ming Liu, Pengcheng Li, Yong Huang, Liang Cheng, Yongming Hu, Zilong Tang, Wanping Chen
Summary: This study reveals two different room-temperature hydrogen-sensing mechanisms among MOXs, with Pt-SnO2 and Pt-ZnO composite nanoceramics showing contrasting and stable responses to hydrogen at room temperature due to different chemical reaction mechanisms.
Article
Physics, Fluids & Plasmas
Sarah E. Harvey, Subhaneil Lahiri, Surya Ganguli
Summary: We use stochastic thermodynamics, large deviation theory, and information theory to establish fundamental limits on the accuracy of single cell receptors in estimating external concentrations. While an ideal observer of receptor states cannot be outperformed by any nonequilibrium receptor, we find that a simple observer measuring the fraction of time the receptor is bound has a fundamental limit on the accuracy of non-equilibrium receptors. We also derive explicit formulas to numerically estimate the tradeoff between accuracy and energy consumption in nonequilibrium receptors.
Article
Crystallography
Yanli Liu, Xiao He, Yan Dong, Su Fu, Yuhui Liu, Dunjun Chen
Summary: The sensing mechanism of InAlN/GaN high electron mobility transistors (HEMTs) is systematically investigated in this study. Numerical simulation and theoretical analysis are used to study the influence of additional surface charge on device performance and the dependence of surface sensing properties on InAlN barrier thickness. The results show that the saturation output drain current and electron gas concentration in the transistor increase with positive surface charge density, but decrease with negative surface charge density. The modulation ability of surface charge on device performance also increases with the decrease of InAlN barrier thickness. This research provides important support for the structural optimization design of GaN-based HEMT sensors.
Article
Chemistry, Analytical
Baojun Long, Yuanmeng Zhao, Peiyu Cao, Wen Wei, Yan Mo, Juejing Liu, Cheng-Jun Sun, Xiaofeng Guo, Changsheng Shan, Ming-Hua Zeng
Summary: The researchers designed a catalyst composed of single-atom Pt supported on Ni(OH)(2) nanoplates/nitrogen-doped graphene for constructing an electrochemical nonenzymatic glucose sensor. The catalyst exhibited low anode peak potential and high sensitivity, with excellent selectivity, short response time, and high stability. The improved performance of the catalyst was attributed to the stronger binding strength of glucose on the single-atom Pt active centers and their surrounding Ni atoms, as well as the fast electron transfer ability of the conductive graphene.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Seung Jin Jeon, Kyung Hee Oh, Youngbo Choi, Ji Chan Park, Hyung Ju Park
Summary: Highly dispersed Pt-incorporated mesoporous Fe2O3 (Pt/m-Fe2O3) particles of 4 μm size were prepared through a simple hydrothermal reaction and thermal decomposition procedures. The gas-sensing properties of Pt/m-Fe2O3 towards formaldehyde were studied. Compared to previous mesoporous Fe2O3-based gas sensors, a sensor based on 0.2% Pt/m-Fe2O3 showed improved gas response, enhanced selectivity, and lower degradation in high-humidity environments when detecting low-level formaldehyde gas at 50 ppb concentration. The enhancement in formaldehyde gas-sensing performance is attributed to the catalytic chemical sensitization of highly dispersed Pt nanoparticles in the mesoporous Fe2O3 microcube architecture.
Article
Materials Science, Ceramics
Lei Zhang, Yimin Gao, Zhifu Huang, Hao Ma, Yangzhen Liu, Wanqi Jie, Lian Zhou
Summary: The resistance mechanism of Mo2NiB2-Ni cermets to sulfuric acid corrosion was investigated. It was found that cermets with higher Ni content exhibited improved corrosion resistance due to the formation of a corrosion product layer from the Ni binder phase, which effectively prevented further erosion of the matrix and hindered the passage of electric charges through the layer.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Ling Li, Ajin Cheruvathur, Shouwei Zuo, Pengfei An, Fang Hou, Jian Xu, Guozhu Li, Guozhu Liu
Summary: The study reveals that the Ni-Pt/Al2O3 bimetallic catalyst exhibits the highest activity in converting liquid hydrocarbon fuels to on-site H-2 via steam reforming process, attributed to the synergistic effect between Ni-enriched surface, Nix+ species and NiPt alloy which facilitate activation and oxidation processes.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Tuan V. Vu, Khang D. Pham
Summary: This work investigated the structural characteristics and SO2 adsorption-sensing properties of pristine and TM-doped HfS2 monolayers (TM = Ni, Pd, or Pt). The most stable doping site for the adatoms is found to be the hollow site between three adjacent sulfur atoms. The SO2 adsorption stability on the TM-doped HfS2 monolayers significantly improves compared with the pristine one. The calculated recovery times of Ni, Pd, and Pt-doped HfS2 monolayers after SO2 adsorption are 208.3 s, 92 s and 5.4 s, respectively. Additionally, TM-doped HfS2 monolayers (TM = Ni, Pd, or Pt) are found to be promising materials for designing SO2 sensors with high sensitivity and repeatability.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Kyungtaek Lee, Jeonhyeong Park, Soon In Jung, Sugato Hajra, Hoe Joon Kim
Summary: Gas sensing equipment is in higher demand due to its ability to detect toxic gases and analyze pollution levels. The trend is towards low-power consumption and miniaturization, with emerging nanomaterials showing potential. Utilizing carbon nanotubes (CNTs) integrated onto a Pt microheater for sensing hydrogen gas has been successful, with efficient electrical resistance change.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Luke D. Smith, Farhan T. Chowdhury, Iona Peasgood, Nahnsu Dawkins, Daniel R. Kattnig
Summary: The mechanism underlying magnetoreception has been a mystery, but the quantum dynamics and recombination reactions of radical pairs in the protein cryptochrome have been proposed as a possible explanation. However, concerns about the validity of this hypothesis have been raised due to unavoidable inter radical interactions. This study shows that sensitivity can be restored by modulating the inter-radical distance and indicates that dynamical processes can enhance the geomagnetic field sensitivity of strongly coupled radical pairs.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Jaeyoung Yoo, Youngtae Park, Jungwoo Choi, Jeonghan Roh, Kihyun Shin, Hyun-Seok Cho, Eunae Cho, Changsoo Lee, Hyuck Mo Lee
Summary: Electrochemical dealloying process can produce highly active ORR electrocatalysts with large ECSA. The dealloyed Pt-Ni nanoparticle network exhibits higher ORR mass activity and catalytic stability, opening up new avenues for designing TM-alloy catalysts with high ORR activity.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Analytical
Gisele A. B. Mello, Valentin Briega-Martos, Juan M. Feliu
Summary: This study investigates the sensitivity of glucose oxidation reaction on different surface structures of magnesium alloys. The results show that the surface structure has a significant impact on the reaction, and different structures lead to different reaction pathways, thus affecting the catalytic activity of the reaction.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)